in the process of a DIY 400A service upgrade, I roughly wired up the main panel waiting for the utility to schedule the switchover to the new line.

For now I have installed a single 125A breaker that I will need to continue have power in the house. The black wires come from a box on the inside. I have marked the neutral with some random white tape and one of the phases with duct tape.

The copper wires go to the Ufer ground. As I had wire in excess, I ran two. The city inspector already approved the ground connection but hasn't seen the other wires.

Are the wires tidy enough? Should I square them up more? The 125A breaker output has flat-blade screws like if it was designed in the 19th century - I need to properly torque those down.

What I am concerned about is that this main panel will only be used to install few more 125A breakers (plus the second 200A above). There aren't many neutral connections for larger size wire.

I'm in the process of a DIY 400A service upgrade, I roughly wired up the main panel waiting for the utility to schedule the switchover to the new line.

For now I have installed a single 125A breaker that I will need to continue have power in the house. The black wires come from a box on the inside. I have marked the neutral with some random white tape and one of the phases with duct tape.

The copper wires go to the Ufer ground. As I had wire in excess, I ran two. The city inspector already approved the ground connection but hasn't seen the other wires.

Are the wires tidy enough? Should I square them up more? The 125A breaker output has flat-blade screws like if it was designed in the 19th century - I need to properly torque those down.

What I am concerned about is that this main panel will only be used to install few more 125A breakers (plus the second 200A above). There aren't many neutral connections for larger size wire.